3 replies to this topic

[scotty_18]

I have a CAM 6232 crank and a 12g1505 crank. I'm currently building a 1380, and was just wondering what crank would be best to use?

 

I understand the 6232 was used in turbo engines, would that make it stronger?

[The Principal]

12G1505

1275cc

Non-S, EN16T with 1.75" dia. big ends

 

CAM6232

1275cc

Rolled-fillet radius on bearing journals, A+ with 1.75" dia. big ends

 

they are both standard cranks the question is which is in better condition have you measured the journal sizes either could have been ground a few times.

 

by the way the 6232 is still available as new

 

edit - Just found this reference for the 6232 to answer your question - This crankshaft was used in all 1275cc, A+, transverse engines including the MG Metro Turbo. There are various un-confirmed opinions on the subject of whether the material was any different, or whether it was heat treated differently. It would appear that early Turbos had just the standard spec, EN16T, non-heat treated type fitted. Later examples certainly appear to have been heat-treated, probably an up-to-date, emissions-friendly version of 'Tuftriding' (a recognised ICI registered process) - possibly a forerunner to Nitro-Carburising. These crankshafts have a distinctly charcoal-grey/black finish - mostly detectable on the webs, water pump/alternator pulley end and in the rolled fillet radii. The later being fairly 'deep' and very even. - http://www.calverst....roductionID.htm

Edited by The Principal, 21 April 2014 - 03:44 PM.

[ACDodd]

Genuine turbo crank is a CAM 6581. 6232 crank is a stock A+ 1275 crank. It is very good for all applications.

AC

[scotty_18]

Thanks a lot for your help guys. So what ever one is in better condition I should keep and use?